308 MR. A. S. HOEXE — A CONTEIBUTION TO 



Fig. 67. Cornus sanguinea. Showing tlie single integument and axial rows. x290 approx. 



Fig. G8. Aucuha japonica. Vertical section showing the earliest stage in the development of the 



ovnlar mamelou. x600 approx. 

 Fig. 69. A.japonica. An early stage in the formation of parietal tissue. x590 approx. 

 Fig. 70. A.japonica. Vertical section through the nucellus showing the enlarged enihryo-sac-mother- 



cell. x290 approx. 

 Fig. 71. A. japonica. Transverse section of the nucellus showing two megaspores belonging to 



different axial rows. X 290 approx. 

 Fig. 72. A. himalaica. Reconstruction from three vertical sections of the nucellus showing a complete 



embryo-sac and an enlarged megaspore, x 290 approx. 

 Fig- 73. Helwingia ruscifoUa. Vertical section of a young ovule showing an early stage in the 



development of the single integument and the nucellus. x 580 approx. 

 Fig, 74-. H^ 7'uscifolia. Vertical section of the nucellus showing the embryo-sac. x 290 approx. 

 Fig. 75. Griselinia lucida. Vertical section of the nucellus at a very early stage. x580 approx. 

 Fig, 76. G. lucida, A slightly older stage showing axial rows, x 580 approx. 

 Fig, 77. Nyssa sylvatica. Transverse section of a very young ovule showing the nucellus invested 



by a single integument, x 580 approx. 



N.B. — Figs. 51-77 are semi-diagrammatic. 



Plate 30. 



[Abhreviations: — a^ A, Cj d^ <?:^ principal bundles; -7^, = inner peripheral bundle (corresponds to axial 



bundle); in. 5^r. = dorsal and lateral carpellary branches; oi;. 1^ 02;. 2, ot^. 3 = placental branches 

 froma^,; J9^. = petal-bundle; 5/, = stemoual trace; ^, y= auxiliary bundles; a;^ y' = branches 



from X, y respectively.] % 



Fig. 78, Photograph of a reconstruction in wax of the vascular system of the flower of Viburnum 



Lantana. x 60 approx. 



Abbreviations occurring in Text-figures 1-12. 



fl. Fig. 3^ ovular rudiment; Fig. 4^ principal bundle. 



a'. 



Fig, 3j ovular rudiment. 



ax. Figs. 2, 3, 9 and LO, axial bundles. 



b. Fig, 3, ovular rudiment; Fig. 4, principal bundle. 

 b\ Fig. 3, ovular rudiment. 



br^ Fig. 4^ bracteole ; Fig. 11, branches from outer series. 



c. Fig. 3^ ovular rudiment ; Fig. 4^ principal bundle. 

 c'. Fig. 3, ovular rudiment. 



d. Figs. 1, 8-10, dorsal carpellary bundle; Fig. 4, princi] 



e. Fig. 4^ principal bundle. 

 emb. Fig. 8^ embryo. 



end. Fig. 8, endosperm. 



/. Fig. 8^ epigynous foliole (bracteoL 

 in. ser. Figs. 1-12, inner series. 



inf. Figs. 9 and 10, integument. 



) 



i. Fig. 1, lateral carpellary bundle ; Fig. 9, branches from axial bundles. 



